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LBitmap::Offset

#include "ltwrappr.h"

L_INT LBitmap::Offset(nHorizontalShift, nVerticalShift, crBackColor, uFlags)

Shifts the bitmap pixels horizontally and vertically.

Parameters

L_INT nHorizontalShift

Horizontal shift of the bitmap, in pixels.

L_INT nVerticalShift

Vertical shift of the bitmap, in pixels.

COLORREF crBackColor

The COLORREF value that specifies the fill color for any exposed areas. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color. This is only useful when uFlags parameter is set to FILL_CLR.

L_UINT uFlags

Flag that indicates how to handle any exposed areas resulting from the bitmap shift.

Possible values are:

Value	Meaning
FILL_CLR	[0x0000] Fill the exposed areas with crBackColor.
FILL_NOCHG	[0x0002] Leave the exposed area as is, without changing it.
FILL_RPT	[0x0001] Stretch the image edges to fill the exposed area.
FILL_WRAP	[0x0003] Fill any exposed areas with the opposite side of the image.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This function shifts the bitmap pixels horizontally and vertically.

Use the LBitmapRgn::Offset function to move a bitmap region by the specified number of rows and columns.

This function supports 12- and 16-bit grayscale and 48- and 64-bit color images. Support for 12- and 16-bit grayscale and 48- and 64-bit color images is available only in the Document/Medical toolkits.

To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallback.

This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Required DLLs and Libraries

LTIMGEFX
For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

Example

L_INT LBitmap__OffsetExample(LBitmapWindow m_LBitmapWnd) 
{ 
   L_INT nRet; 
   LBitmap LeadBitmap; 
 
   nRet =LeadBitmap.Load(MAKE_IMAGE_PATH(TEXT("IMAGE1.CMP")), 0,ORDER_BGR); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =LeadBitmap.Offset(m_LBitmapWnd.GetWidth() / 2, m_LBitmapWnd.GetHeight() / 2, 0, FILL_WRAP); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   return SUCCESS; 
}